NorthStar Battery App vs RedoCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NorthStar Battery App
Discover premium batteries and site solutions with this app. It helps you find the ideal product, compare performance, locate resellers, and access datasheets and videos. A built-in browser also lets you explore the company website.
- Product selection tools
- Battery performance comparison
- Reseller locator
- Vehicle battery sizing
- Datasheet downloads
- Product videos
- Built-in web browser
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Download the NorthStar Battery App to get all the latest news and information about premium NorthStar Batteries and Site Solutions. Use the NorthStar Battery App to: - Find the ideal product with our product selection tools. - Compare the performance of our battery with standard batteries. - Find the NorthStar reseller closest to you. - Find the perfect sized battery for your vehicle. - Download datasheets and find the data you need. - Watch videos about our products and company. - Browse www.northstarbattery.com with the built-in browser.
RedoCalc
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This is a calculator for people who only use it for simple calculations, such as adding up receipts or calculating the cost of a meal split between several people, but who are always worried about whether the input was correct. As it is a simple calculator, the only operations it can perform are - Four arithmetic operations (addition, subtraction, multiplication, division) - Percentage calculations (including calculations such as consumption tax using percentages) . The results are displayed as numbers with a digit symbol. There is no complicated exponential display. The calculation proceeds in the order of the keys you enter. There is no priority for multiplication or division. The formulas you enter are displayed in order in the upper area as a history. If you tap the white part, it will turn yellow and you will be able to modify that part. (You can modify not only numbers, but also arithmetic symbols such as + and ×.) If you tap “=”, the expressions from the first line to the last line will be recalculated. The result will be automatically copied, so you can switch to other apps and paste the value there.
Screenshots
Verdict
The clearest difference is ads: NorthStar Battery App at none against RedoCalc's shown. NorthStar Battery App also leads on device support (3 vs 1) and iOS requirement (8.0 vs 18.0). RedoCalc's advantage is update cadence (every 3 days vs every 3 months). On price and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
NorthStar Battery App ships an update every 3 months, RedoCalc every 3 days. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.
| Parameter | NorthStar Battery App | RedoCalc |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (2 ratings) — better | — |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 months | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 8.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 33 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | ENERSYS SARL | Toshiyuki Kuwabara |
In-app purchases
NorthStar Battery App
No in-app purchases
RedoCalc
No in-app purchases
Questions
Is NorthStar Battery App free?
Is RedoCalc free?
Do NorthStar Battery App or RedoCalc have ads?
Which is updated more often, NorthStar Battery App or RedoCalc?
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